Looks like its the OLX.com's owner who purchased both the domains.
They probably don't own the trademark on OLX, so that's why they made sure that they purchased those. Must have some plans for them in order for them to pay that much for those domains.
But is that how you spell 'secret' in German?
To be honest, I don't really think that 16k is worth any kind of domain, except maybe google.com.